Timeline for First time schematic for USB-C power detection
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
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| May 30, 2023 at 1:29 | comment | added | StealthRT | Alright I updated the OP again with your suggestions. Let me know if it's correct. | |
| May 30, 2023 at 0:20 | comment | added | brhans | No, IN+ to 5V (Vcc/Vs) and IN- to USB Vbus. You want current to flow from your circuit 5V, through the 0.1R resistor, and over to the USB (with the InAmp measuring across the resistor) . USB GND goes to to circuit Gnd (which you've forgotten on J2 but the others look ok). | |
| May 29, 2023 at 23:46 | comment | added | StealthRT | A little confused as to what you are saying. Connect the + to usb vbus and - to ground? As I look at it that’s how it’s connected in the new one? | |
| May 29, 2023 at 22:11 | comment | added | brhans | @StealthRT, but you've created a new problem with the other changes you made. Your 0.1R current sensing resistors are now connected directly between Vcc and Gnd. 5V across 0.1R means that each one of those will try to draw 50A from the supply ... You should have left the USB connectors VBUS connected to the InAmp's -IN as you had it before, and connected +IN to Vcc instead of Gnd. | |
| May 29, 2023 at 22:08 | comment | added | brhans | @StealthRT if you tie A0 & A1 directly to Vcc, Gnd, or wherever (as you've done in your update schematic), then no you do not need the resistors. They are only needed if you follow Adafruit's method where you solder the SJ jumpers to pull the pin high or leave the SJ jumpers open to let the resistor pull it low. | |
| May 29, 2023 at 19:28 | comment | added | StealthRT | Are the 2 resistors still needed on the A0/A1 lines? | |
| May 29, 2023 at 19:21 | comment | added | StealthRT | Thanks for catching that +/- issue. And also thank you for letting me know about the I2C resistors just needing to be used once. I have added a new schematic of these changes to my OP. | |
| May 29, 2023 at 5:34 | history | answered | brhans | CC BY-SA 4.0 |